Choose Disk Utility and click on the Continue button. Immediately after the chime hold down the Command and Rkeys until the Utility Menu appears. Repair the disk by booting from the Recovery HD.
You should try each, one at a time, then test to see if the problem is fixed before going on to the next.īe sure to backup your files before proceeding if possible. A Troubleshooting Protocol to Identify Problems or Fix macOS El Capitan or Later
